HES-21 ESM/ELINT and self protection Electronic Support Measures

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The HES-21 is a highly integrated system providing excellent tactical situational awareness in terms of electronic order of battle (EOB) as well as data-strategic collection and analysis capabilities for creation and maintenance of electronic intelligence databases and libraries for emitter identification.

Last updated: 14 May 2019 • 19:14

Features

RWR sensors and BOL CM dispenser

BOP-L CM dispensers

HES-21 provides Electronic Support Measures, Electronic Intelligence and Self-Defence by means of Counter Measures. The HES-21 is a highly integrated system providing excellent tactical situational awareness in terms of electronic order of battle (EOB) as well as data-strategic collection and analysis capabilities for creation and maintenance of electronic intelligence databases and libraries for emitter identification.

RF Receivers

Emitter identification

Direction finding and emitter location

ELINT capabilities

Human-machine interface (HMI)

Self-protection system (SPS)

EW Support

RF Receivers

High-precision phase-difference interferometric direction-finding (DF) techniques are used with digital FFT-based channelised receivers for high sensitivity and long detection range and selectivity in dense scenarios.

Emitter identification

Advanced and well-proven, high confidence, automatic emitter-identification algorithms based on a fully user-programmable library.

Direction finding and emitter location

Position is estimated for every ground-based track by the emitter location function.

ELINT capabilities

Pulse and intrapulse data from intercepted signals can be displayed in real time displays and captured as formatted pulse-descriptor words (PDW) and intrapulse descriptor words (IDW) for off-line analysis.

Extensive recording capabilities that can either be initiated manually, or automatically controlled by events in combination with library data.

Human-machine interface (HMI)

The ESM system has a user-friendly, Windows-based graphical user interface with situational-awareness display, including a geographical map, and real-time monitoring and analysis capabilities.

Self-protection system (SPS)

The sensor range includes radar warning, laser warning and missile-approach warning and provides established tracks to the defensive-aids controller for evaluation. The defensive-aids controller provides the selection and initiation in auto modes of chaff/flare countermeasures sequences based on the weapon system data from the threat library. In manual mode, the pilot can select countermeasure programmes and initiate dispensing using the cockpit controls.

EW Support

Saab offers an EW Support system to meet the extremely demanding needs of EW organisations performing analysis of electronic-warfare data and the reprogramming of threat-and-countermeasures libraries.

It significantly reduces the time needed for the reprogramming of threat libraries and analysis of recorded EW data, thereby enhancing crew survivability and the likelihood of mission success.

For operational support in EW matters, we offer Saab EW Operational Support, EWOS.

In use

HES-21 is based on well-proven subsystems in operation on various fighter, transport and helicopter aircraft. It is installed on the Saab 2000 AEW&C.